Is there a way to create complex multiselect field?

There's a few options depending on what you're trying to accomplish. It ultimately comes down to what info you want to use to filter or automate.

One Long text field: You could keep the text "Beginner, Dutch - Mid-Level, Japanese - Fluent" in a long text field. You could then create filtered views that reduce the Language field down to text that contains "Dutch" or "Japanese - Fluent" etc. based on your interests.

One Multi-Select field: You could use one multi-select field with 3-4 variations of each language. Your options would include:

• English - Beginner

• English - Mid-Level

• English - Advanced

• English - Fluent

• Dutch - Beginner

• Dutch - Mid-Level

• Dutch - Advanced

• Dutch - Fluent

• ... etc.

Multi Select field w/ details in long text field: You could have one multi select field that stores the language (Options: English, Dutch, Japanese, etc.) then keep details in an additional long text field (contents: "Beginner, Dutch - Mid-Level, Japanese - Fluent")

I don't recommend creating many different fields for different languages, because it becomes hard to organize/filter at that point.

If you want to talk anything through, you can schedule time w/ me here.